Results 41 to 50 of about 66,010 (263)

Young asteroidal fluid activity revealed by absolute age from apatite in carbonaceous chondrite

Nature Communications, 2016
Chondritic meteorites formed in the early solar system and may tell us about primary processes at that time. Here, Zhang et al. report an absolute 207Pb/206Pb isochron age (4,450±50 Ma) of apatite from a carbonaceous chondrite constraining timing of ...
Ai-Cheng Zhang, Qiu-Li Li, Hisayoshi Yurimoto, Naoya Sakamoto, Xian-Hua Li, Sen Hu, Yang-Ting Lin, Ru-Cheng Wang   +7 more
doaj   +1 more source

Meteorites: Messengers from the Early Solar System

CHIMIA, 2010
Meteorites are fragments from solar system bodies, dominantly asteroids. A small fraction is derived from the Moon and from Mars. These rocks tell a rich history of the early solar system and range from solids little changed since the earliest ...
Beda A. Hofmann
doaj   +1 more source

Thermal history modeling of the H chondrite parent body [PDF]

, 2012
The cooling histories of individual meteorites can be empirically reconstructed by using ages from different radioisotopic chronometers with distinct closure temperatures.
Akridge, Arzt, Bennett, Benoit, Birck, Bouvier, Charbonneau, Cherniak, Consolmagno, Dauphas, Dodd, Dodson, D’Antonia, Fei, Fischmeister, Gaffey, Ganguly, Göpel, Güttler, H.-P. Gail, Haisch, Harrison, Henke, Herpfer, Hevey, Hopfe, James, Kakar, Kita, Kleine, Kleine, Kleine, Krause, Krause, Larsson, M. Trieloff, McSween, Minster, Miyamoto, Morbidelli, Nyquist, Pellas, Quitté, Rao, Richardson, Rudraswami, Rudraswami, Rugel, Ryan, S. Henke, Sahijpal, Slater-Reynolds, Storåkers, T. Kleine, Tang, Taylor, Torppa, Trieloff, W. H. Schwarz, Warren, Wittmann, Yomogida, Yomogida   +62 more
core   +1 more source

Decoding Metamorphic Nanodiamonds Formation Through Their Internal Structures

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Metamorphic diamonds offer insights into Earth's evolution, modulating the global carbon cycle through subduction into the mantle and exhumation. However, the formation and internal structure of minute diamonds remain poorly understood. Here, we study the internal structures of diamond‐bearing inclusions from the Eastern Alps using state‐of ...
Tim Sotelšek, Marian Janák, Sašo Šturm, Sorour Semsari Parapari, Nik Gračanin, Kristian Radan, Mehmet Ali Gülgün, Stanislava Milovská, Mirijam Vrabec   +8 more
wiley   +1 more source

Meteorite cloudy zone formation as a quantitative indicator of paleomagnetic field intensities and cooling rates on planetesimals

, 2019
Metallic microstructures in slowly-cooled iron-rich meteorites reflect the thermal and magnetic histories of their parent planetesimals. Of particular interest is the cloudy zone, a nanoscale intergrowth of Ni-rich islands within a Ni-poor matrix that ...
Bryson, James F. J., Maurel, Clara, Weiss, Benjamin P.   +2 more
core   +3 more sources

New knowledge about shock events that affected the L‐chondrite parent body from two heavily shocked L6 meteorite finds

Meteoritics &Planetary Science, EarlyView.
Abstract We report new results from a study of shock‐related features in the L6 ordinary chondrites Northwest Africa (NWA) 4672 and NWA 12841. Our observations confirm the occurrence of eight high‐pressure (HP) minerals in each meteorite, namely, ringwoodite, majorite, akimotoite, wadsleyite, albitic jadeite, lingunite, tuite, and xieite.
I. Baziotis, L. Ferrière, C. Ma, J. Hu, D. Palles, P. D. Asimow   +5 more
wiley   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Formation of nickel–iron meteorites by chemical fluid transport

ScienceOpen Research, 2016
The deposition of solid material from the gas phase via chemical vapor transport (CVT) is a well-known process of industrial and geochemical relevance. There is strong evidence that this type of thermodynamically driven chemical transport reaction plays ...
Werner Schrön
doaj   +1 more source

Heating of near-Earth objects and meteoroids due to close approaches to the Sun

, 2009
It is known that near-Earth objects (NEOs) during their orbital evolution may often undergo close approaches to the Sun. Indeed it is estimated that up to ~70% of them end their orbital evolution colliding with the Sun.
A. Morbidelli, Bottke, Bottke, Bowell, Brucato, Bus, Carvano, Delbo', Delbo', Emery, Grimm, Harris, Harris, Harris, Harris, Hiroi, Hiroi, Keil, Lagerros, Lim, M. Delbo', M. Lazzarin, Marchi, Marchi, Morbidelli, Mustard, P. Paolicchi, Paolicchi, Rivkin, S. Marchi, Salisbury, Spencer, Stuart, Vilas, Wolters, Zavodny   +35 more
core   +3 more sources

A mutli-technique search for the most primitive CO chondrites [PDF]

, 2018
As part of a study to identify the most primitive COs and to look for weakly altered CMs amongst the COs, we have conducted a multi-technique study of 16 Antarctic meteorites that had been classified as primitive COs. For this study, we have determined: (
Alexander, Alexander, Alexander, Alexander, Alexander, Alexander, Alexander, Alexander, Bao, Beaudoin, Bland, Bonal, Brearley, Burton, Busemann, C.M.O'D. Alexander, Chizmadia, Choi, Clayton, Cody, Cressey, Davidson, Davidson, Doyle, Dunn, Greenwood, Greenwood, Greenwood, Greenwood, Grossman, Hallis, Hewins, Howard, Howard, Howard, I.A. Franchi, J.M. Gibson, Jarosewich, K.T. Howard, King, Le Guillou, Lee, Madsen, Menzies, Miller, Nguyen, Nguyen, Nguyen, Nittler, Quirico, R. Bowden, R.C. Greenwood, Sakamoto, Savin, Schrader, Schrader, Schultz, Seto, Sheppard, Smith, Starkey, Tenner, Ushikubo, Ushikubo, Vollmer, Yan, Young, Young, Zheng   +68 more
core   +1 more source